Here's The CW's official description for "To Sprong With Love," the May 12 episode of Reaper!

BEN FIGHTS DEMONS FOR NINA — Sam (Bret Harrison) is excited to learn the next soul he has to capture is his old high school biology teacher, Mr. Sprong, whom everyone hated. He and Andi (Missy Peregrym) eagerly search for Mr. Sprong (guest star Michael McDonald) to send him back to Hell, but the teacher reports the two to the police. Meanwhile, Ben (Rick Gonzalez) realizes he must fight for his love after Nina (Jenny Wade) goes into heat, emitting a pheromone that has demons from all over the world coming to hit on her. Tyler Labine and Ray Wise also star. Posted on ReaperSite. Jamie Babit directed the episode written by Michele Fazekas & Tara Butters (#212).